630438197 has 8 divisors (see below), whose sum is σ = 635384544. Its totient is φ = 625505328.

The previous prime is 630438191. The next prime is 630438199. The reversal of 630438197 is 791834036.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-630438197 is a prime.

It is a super-2 number, since 2×630438197² = 794904640473221618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630438191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103478 + ... + 109400.

It is an arithmetic number, because the mean of its divisors is an integer number (79423068).

Almost surely, 2^630438197 is an apocalyptic number.

It is an amenable number.

630438197 is a deficient number, since it is larger than the sum of its proper divisors (4946347).

630438197 is a wasteful number, since it uses less digits than its factorization.

630438197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6739.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 630438197 is about 25108.5283718501. The cubic root of 630438197 is about 857.4605985630.

The spelling of 630438197 in words is "six hundred thirty million, four hundred thirty-eight thousand, one hundred ninety-seven".